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Class Information
Number: 122/145
Name: Liquid heaters and vaporizers > Flue > Horizontal > Internal water tube > Transverse
Description: Devices having water tubes extending across the flues and communicating with the boiler at both ends.

Sub-classes under this class:

Class Number Class Name Patents
122/146 Drop water firebox 0
122/147 Return fire tube 0

Patents under this class:

Patent Number Title Of Patent Date Issued
4316436 Heat exchanger Feb. 23, 1982
4062324 Firetube economizer Dec. 13, 1977
4044726 Circulating water heater Aug. 30, 1977

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